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WaterWatch

DATA CENTER

Real-Time Data

Streamflow:
PR
Groundwater:
PR | VI
Water Quality:
PR
Precipitation:
PR
Lake/Reservoir:
PR
Data Mapper:
PR | VI

Historical Data

Streamflow:
PR | VI
Groundwater:
PR | VI
Water Quality:
PR | VI
Annual Data Reports
PR | VI
Duration hydrographs:
PR

WaterWatch

Flooding:
PR
Drought:
PR
Current conditions:
PR
Water quality:
PR

Groundwater networks

Water Levels:
PR
Climate Response:
PR

*VI=Virgin Islands

USGS IN YOUR STATE

USGS Water Science Centers are located in each state.

There is a USGS Water Science Center office in each State. Washington Oregon California Idaho Nevada Montana Wyoming Utah Colorado Arizona New Mexico North Dakota South Dakota Nebraska Kansas Oklahoma Texas Minnesota Iowa Missouri Arkansas Louisiana Wisconsin Illinois Mississippi Michigan Indiana Ohio Kentucky Tennessee Alabama Pennsylvania West Virginia Georgia Florida Caribbean Alaska Hawaii New York Vermont New Hampshire Maine Massachusetts South Carolina North Carolina Rhode Island Virginia Connecticut New Jersey Maryland-Delaware-D.C.

USGS WaterWatch

WaterWatch is a U.S. Geological Survey (USGS) World Wide Web site that displays maps, graphs, and tables describing real-time, recent, and past streamflow conditions for the United States. The real-time information generally is updated on an hourly basis. WaterWatch provides streamgage-based maps that:

  • Show the location of more than 3,000 long-term USGS streamgages;
  • Use colors to represent streamflow conditions compared to historical streamflow;
  • Feature a point-and-click interface allowing users to retrieve graphs of stream stage (water elevation) and flow;
  • Highlight locations where extreme hydrologic events, such as floods and droughts, are occurring.

Current streamflow conditions

Real-time streamflow Current water-resources conditions: View real-time streamflows compared to past conditions.

The map depicts streamflow conditions as computed at USGS gaging stations. The colors represent real-time streamflow compared to percentiles of historical daily streamflow for the day of the year.

This map represents conditions relative to those that have historically occured at this time of year. Only stations having at least 30 years of record are used.
(Find out about .
):

Map · Summary plot · Percent plot · Summary table · Map animation · Streamflow table · Google Earth KML

Flood and high flow The "Flood and high flow" map shows the location of streamgages where the water level is currently at or above flood stage (depicted as a black triangle) or at high flow (depicted as blue circles) The high flow conditions are expressed as percentiles that compare the current (i.e., within the past several hours) instantaneous flow value to historical daily mean flow values for all days of the year. Please note that flood conditions may be more extensive than shown on the map because the National Weather Service (NWS) has not identified a flood stage (for flood forecasting purposes) at all USGS streamgaging sites. Also, the NWS has determined flood stages for some non-USGS streamgaging sites, which are not shown on the map. The most complete depiction of streamgages at or above flood stage is on the NWS River Conditions Map.   The real-time data used to produce this map are provisional and have not been reviewed or edited. They may be subject to significant change. Also, in this regard, during winter months the flood and high flows appearing on the map in some states may result from ice effects.(Find out about .):

Map · Locations above flood stage · Map animation

Daily streamflow for day of year The "Daily streamflow" map shows average streamflow conditions for the previous day. The map is similar in appearance to the "Real-time streamflow map" but less likely to reflect the influence of short-term events such as reservoir releases and short-duration precipitation events.

The map depicts streamflow conditions as computed at USGS aging stations. The colors represent daily streamflow compared to percentiles of historical daily streamflow for the day of the year. This map represents conditions adjusted for this time of the year. Only stations having at least 30 years of record are used.
(Find out about .
):

Map · Summary plot · Percent plot · Summary table · Drainage basin (HUC) map

Daily steamflow for all days of year The "Daily streamflow" map shows average streamflow conditions for the previous day. The map is similar in appearance to the "Real-time streamflow map" but less likely to reflect the influence of short-term events such as reservoir releases and short-duration precipitation events.

The map depicts streamflow conditions as computed at USGS aging stations. The colors represent daily streamflow compared to percentiles of historical daily streamflow for the day of the year. This map represents conditions adjusted for this time of the year. Only stations having at least 30 years of record are used.
(Find out about .
):

Map · Summary plot · Percent plot · Summary table · Drainage basin (HUC) map

7-day average streamflow for day of year The "7-day average streamflow" map shows the average streamflow conditions for the past seven days. By averaging over an entire week, the values on the map are more indicative of longer-term streamflow conditions than either the "Real-time streamflow" or the "Daily streamflow" maps.

The map depicts 7-day average streamflow conditions as computed at USGS gaging stations. The colors represent 7-day average streamflow compared to percentiles of historical 7-day average streamflow for the day of the year. This map represents conditions adjusted for this time of the year. Only stations having at least 30 years of record are used.
(Find out about .
):

Map · Summary plot · Percent plot · Summary table · Drainage basin (HUC) map

7-day average streamflow for all days of year The "7-day average streamflow" map shows the average streamflow conditions for the past seven days. By averaging over an entire week, the values on the map are more indicative of longer-term streamflow conditions than either the "Real-time streamflow" or the "Daily streamflow" maps.

The map depicts 7-day average streamflow conditions as computed at USGS gaging stations. The colors represent 7-day average streamflow compared to percentiles of historical 7-day average streamflow for all days of the year. This map represents conditions in the context of all historical data. Only stations having at least 30 years of record are used.
(Find out about .
):

Map · Summary plot · Percent plot · Summary table · Drainage basin (HUC) map

14-day average streamflow for day of year The "14-day average streamflow" map shows the average streamflow conditions for the past 14 days. By averaging over 14 days, the values on the map are more indicative of longer-term streamflow conditions than either the "Real-time streamflow" or the "Daily streamflow" maps.

The map depicts 14-day average streamflow conditions as computed at USGS gaging stations. The colors represent 14-day average streamflow compared to percentiles of historical 14-day average streamflow for the day of the year. This map represents conditions adjusted for this time of the year. Only stations having at least 30 years of record are used.
(Find out about .
):

Map · Drainage basin (HUC) map

28-day average streamflow for day of year The "28-day average streamflow" map shows the average streamflow conditions for the past 28 days. By averaging over past 28 days, the values on the map are more indicative of longer-term streamflow conditions than either the "Real-time streamflow" or the "Daily streamflow"" maps.

The map depicts 28-day average streamflow conditions as computed at USGS gaging stations. The colors represent 28-day average streamflow compared to percentiles of historical 28-day average streamflow for the day of the year. This map represents conditions adjusted for this time of the year. Only stations having at least 30 years of record are used.
(Find out about .
):

Map · Drainage basin (HUC) map

FloodWatch

Map of flood and high flow locations The "Flood and high flow" map shows the location of streamgages where the water level is currently at or above flood stage (depicted as a black triangle) or at high flow (depicted as blue circles) The high flow conditions are expressed as percentiles that compare the current (i.e., within the past several hours) instantaneous flow value to historical daily mean flow values for all days of the year. Please note that flood conditions may be more extensive than shown on the map because the National Weather Service (NWS) has not identified a flood stage (for flood forecasting purposes) at all USGS streamgaging sites. Also, the NWS has determined flood stages for some non-USGS streamgaging sites, which are not shown on the map. The most complete depiction of streamgages at or above flood stage is on the NWS River Conditions Map.(Find out about .)

Table of locations above flood stages

Summarize recent flood and high-flow conditions

DroughtWatch

State drought information View a map showing the 7-day average streamflow conditions in hydrologic units of the United States and Puerto Rico for the day of year. The colors represent 7-day average streamflow percentiles based on historical streamflow for the day of the year. Thus, the map shows conditions adjusted for this time of the year. Only stations having at least 30 years of record are used. Subregions shaded gray indicate that insufficient data were available to compute a reliable 7-day average streamflow value. During winter months, this situation frequently arises due to ice effects. The data used to produce this map are provisional and have not been reviewed or edited. They may be subject to significant change.(Find out about .)

7-day below normal streamflow for day of year The "below normal 7-day average streamflow" map shows the average streamflow conditions for the past 7 days. By averaging over 7 days, the values on the map are more indicative of longer-term streamflow conditions than either the "Real-time streamflow" or the "Daily streamflow" maps.

The map depicts below normal 7-day average streamflow conditions as computed at USGS gaging stations. The colors represent below normal 7-day average streamflow compared to percentiles of historical below normal 7-day average streamflow for the day of the year. This map represents conditions adjusted for this time of the year. Only stations having at least 30 years of record are used.
(Find out about .
)

Map · Summary plot · Drainage basin (HUC) map

7-day below normal streamflow for all days of year The "below normal 7-day average streamflow" map shows the average streamflow conditions for the past 7 days. By averaging over 7 days, the values on the map are more indicative of longer-term streamflow conditions than either the "Real-time streamflow" or the "Daily streamflow" maps.

The map depicts below normal 7-day average streamflow conditions as computed at USGS gaging stations. The colors represent below normal 7-day average streamflow compared to percentiles of historical below normal 7-day average streamflow for all days of the year. This map represents conditions in the context of all historical data. Only stations having at least 30 years of record are used.
(Find out about .
)

Map · Summary plot · Drainage basin (HUC) map

14-day below normal streamflow for day of year The "below normal 14-day average streamflow" map shows the average streamflow conditions for the past 14 days. By averaging over 14 days, the values on the map are more indicative of longer-term streamflow conditions than either the "Real-time streamflow" or the "Daily streamflow" maps.

The map depicts below normal 14-day average streamflow conditions as computed at USGS gaging stations. The colors represent below normal 14-day average streamflow compared to percentiles of historical below normal 14-day average streamflow for the day of year. This map represents conditions adjusted for this time of the year. Only stations having at least 30 years of record are used.
(Find out about .
)

Map · Drainage basin (HUC) map

28-day below normal streamflow for day of year The "below normal 28-day average streamflow" map shows the average streamflow conditions for the past 28 days. By averaging over 28 days, the values on the map are more indicative of longer-term streamflow conditions than either the "Real-time streamflow" or the "Daily streamflow" maps.

The map depicts below normal 28-day average streamflow conditions as computed at USGS gaging stations. The colors represent below normal 28-day average streamflow compared to percentiles of historical below normal 28-day average streamflow for the day of year. This map represents conditions adjusted for this time of the year. Only stations having at least 30 years of record are used.
(Droughtwatch: 28-day below normal streamflow for day of year .
)

Map · Drainage basin (HUC) map

Recent and Historical StreamFlow

Maps of recent 1-day, 7-day, 14-day, and 28-day average streamflow

Maps of recent monthly average streamflow The "Monthly-Average Streamflow" map upgrades and replaces the "National Water Conditions" map. The new monthly map shows the average streamflow conditions in hydrologic units of the United States and Puerto Rico for the past calendar month. The colors represent monthly average streamflow compared to percentiles of historical streamflow for the calendar month. Thus, the map represents conditions adjusted for this time of the year.

Only stations having at least 30 years of record are used. Subregions shaded gray indicate that insufficient data were available to compute a reliable monthly average. During winter months, this situation frequently arises due to ice effects. The data used to produce this map are provisional and have not been reviewed or edited. They may be subject to significant change.
(Find out about .
)

Maps of historical annual and monthly runoff for hydrologic units

Time-series plots of historical annual runoff for hydrologic units

Annual summary

Annual Streamflow Summaries

2006 | 2007 | 2008

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Page Last Modified: Wednesday, 20-Apr-2016 14:52:41 EDT